I just thought I would let everyone know that not all quests count towards this achievement. I found this out the hard way…spent a few hours grinding out quests and thought for sure I would get credit. After a while I decided to track the achievement progress for that zone, Eastern Kingdoms, and lo and behold when I turned a few in the number only went up once (3 quests, 1 counted). You can look up individual quests or by zone at wowhead and read the comments to see if it counts.
The quests that didn’t count for Loremaster did appear to count for Seeker. Hope that helps some of you going for this/these achievement(s)
Hope that this was legible as I had multiple kid and wife aggro while trying to post this